Table 5 Attributes of PPMs
| Attributes | |
| 1. Accountability mechanism [46,47,48,49,50] | |
| 2. Bundling of services [51,52,53] | |
| 3. Payment rate [31, 47, 49, 51, 53,54,55,56,57] | |
| 4. Payment schedule [31, 46, 49] | |
| 5. Performance indicators [48, 49, 57,58,59] | |
| 6. Sufficiency of payment rate [31, 51, 52, 60] | |
| 7. Timeliness of payment [47, 52, 56] |